RADIO SYSTEM, RADIO BASE STATION AND RADIO TERMINAL
First Claim
1. A radio system having a first radio terminal, a second radio terminal and a base station, in which the first radio terminal and the second radio terminal transmit radio signals to the radio base station under a space multiplexing scheme,the first radio terminal comprising a first transmitting unit configured to transmit a request signal to the radio base station for requesting an access right to transmit radio signals to the radio base station, the request signal describing a first period during which the radio terminals can transmit continuously radio signals without relinquishing the access right and a second period which is a transmission period of radio signals under the space multiplexing scheme, the second period being shorter than the first period and the second period being included in the first period,the second radio terminal comprising a prevention unit configured to prevent transmission of radio signals for predetermined duration when receiving radio signals other than those directed to the second radio terminal,the radio base station comprising:
- a receiving unit configured to receive the request signal from the first radio terminal;
a storage configured to store an identifier of a radio terminal which can transmit radio signals to the radio base station under the space multiplexing scheme in association with the first radio terminal; and
a second transmitting unit configured to transmit an assignment signal for assigning an access right to transmit radio signals to the radio base station to not only the first radio terminal which is a sender of the request signal, but also the second radio terminal when an identifier of the second radio terminal is stored in association with the first radio terminal in the storage, the first period and the second period being described in the assignment signal,wherein the first radio terminal transmits radio signals according to the assignment signal,the second radio terminal cancels the prevention of transmission of radio signals and transmits radio signals according to the assignment signal even when transmission of radio signals is prevented according to receiving of the request signal directed to the radio base station, andduring the first period, transmission of radio signals by the first radio terminal and the second radio terminal is performed without the access right being relinquished, and transmission of the radio signals by the first radio terminal and the second radio terminal under the space multiplexing scheme completes within the second period.
3 Assignments
0 Petitions
Accused Products
Abstract
One of a plurality of radio terminals that transmit radio signals to a radio base station under a space multiplexing scheme, including a receiving unit 42 that receives an access right request signal with respect to the radio base station from an other radio terminal, a prevention unit 43 that prevents transmission of radio signals when receiving radio signals directed to an other radio terminal, a cancellation unit 43 that cancels the prevention of transmission when receiving an access right assignment signal during the prevention of transmission and a transmitting unit 41 that transmits a data signal to the radio base station according to the assignment signal, wherein radio signals are transmitted to the radio base station simultaneously with the other radio terminals and under the space multiplexing scheme.
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Citations
24 Claims
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1. A radio system having a first radio terminal, a second radio terminal and a base station, in which the first radio terminal and the second radio terminal transmit radio signals to the radio base station under a space multiplexing scheme,
the first radio terminal comprising a first transmitting unit configured to transmit a request signal to the radio base station for requesting an access right to transmit radio signals to the radio base station, the request signal describing a first period during which the radio terminals can transmit continuously radio signals without relinquishing the access right and a second period which is a transmission period of radio signals under the space multiplexing scheme, the second period being shorter than the first period and the second period being included in the first period, the second radio terminal comprising a prevention unit configured to prevent transmission of radio signals for predetermined duration when receiving radio signals other than those directed to the second radio terminal, the radio base station comprising: -
a receiving unit configured to receive the request signal from the first radio terminal; a storage configured to store an identifier of a radio terminal which can transmit radio signals to the radio base station under the space multiplexing scheme in association with the first radio terminal; and a second transmitting unit configured to transmit an assignment signal for assigning an access right to transmit radio signals to the radio base station to not only the first radio terminal which is a sender of the request signal, but also the second radio terminal when an identifier of the second radio terminal is stored in association with the first radio terminal in the storage, the first period and the second period being described in the assignment signal, wherein the first radio terminal transmits radio signals according to the assignment signal, the second radio terminal cancels the prevention of transmission of radio signals and transmits radio signals according to the assignment signal even when transmission of radio signals is prevented according to receiving of the request signal directed to the radio base station, and during the first period, transmission of radio signals by the first radio terminal and the second radio terminal is performed without the access right being relinquished, and transmission of the radio signals by the first radio terminal and the second radio terminal under the space multiplexing scheme completes within the second period.
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2. One of a plurality of radio terminals that transmit radio signals to a radio base station under a space multiplexing scheme, comprising:
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a receiving unit configured to receive a request signal for requesting an access right to transmit radio signals to the radio base station, the request signal being transmitted from an other radio terminal to the radio base station, the request signal describing a first period during which the radio terminals can transmit continuously radio signals without relinquishing the access right and a second period which is a transmission period of radio signals under the space multiplexing scheme, the second period being shorter than the first period and the second period being included in the first period; a prevention unit configured to prevent transmission of radio signals for predetermined duration, upon receiving the request signal; a cancellation unit configured to cancel prevention of transmission of radio signals upon receiving an assignment signal for assigning an access right to transmit radio signals to the radio base station during duration during which transmission of radio signals is prevented, the first period and the second period being described in the assignment signal; and a transmitting unit configured to transmit radio signals to the radio base station according to the assignment signal, wherein the assignment signal is transmitted from the radio base station to the one radio terminal and the other radio terminal, and during the first period, transmission of radio signals by the one radio terminal and the other radio terminal is performed without the access right being relinquished, and transmission of the radio signals by the one radio terminal and the other radio terminal under the space multiplexing scheme completes within the second period. - View Dependent Claims (3, 4)
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5. A radio base station that receives radio signals transmitted from a first radio terminal and a second radio terminal under a space multiplexing scheme, comprising:
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a receiving unit configured to receive a request signal for requesting an access right to transmit radio signals to the radio base station from the first radio terminal, the request signal describing a first period during which the first terminal can transmit continuously radio signals without relinquishing the access right and a second period which is a transmission period of radio signals under the space multiplexing scheme, the second period being shorter than the first period and the second period being included in the first period; a storage configured to store an identifier of a radio terminal which can transmit radio signals to the radio base station under the space multiplexing scheme in association with the first radio terminal; and a transmitting unit configured to transmit an assignment signal for assigning an access right to transmit radio signals to the radio base station to not only the first radio terminal which is a sender of the request signal but also the second radio terminal when an identifier of the second radio terminal is stored in the storage in association with the first radio terminal, the first period and the second period being described in the assignment signal, wherein the receiving unit receives radio signals transmitted from the first radio terminal and the second radio terminal under the space multiplexing scheme, and during the first period, transmission of radio signals by the first radio terminal and the second radio terminal is performed without the access right being relinquished, and transmission of the radio signals by the first radio terminal and the second radio terminal under the space multiplexing scheme completes within the second period. - View Dependent Claims (6, 7, 8, 9, 10)
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11. One of a plurality of radio terminals that continuously can transmit radio signals without relinquishing access rights to transmit radio signals and transmit radio signals to a radio base station under a space multiplexing scheme, comprising:
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a receiving unit configured to receive a request signal for requesting an access right to transmit radio signals to the radio base station, the request signal being transmitted from an other radio terminal among the plurality of radio terminals to the radio base station; a prevention unit configured to prevent transmission of radio signals for predetermined duration, upon receiving the request signal which is radio signals other than those directed to the one radio terminal; a cancellation unit configured to cancel the prevention of transmission of radio signals upon receiving an assignment signal for assigning an access right to transmit radio signals to the radio base station during duration during which transmission of radio signals is prevented; and a transmitting unit configured to transmit radio signals to the radio base station according to the assignment signal, wherein the request signal describes a first period during which the radio terminals can transmit continuously radio signals without relinquishing the access right and a second period which is a transmission period of radio signals under the space multiplexing scheme and is included in the first period, the second period is shorter than the first period and included in the first period, the assignment signal describes the first period and the second period, the assignment signal is transmitted from the radio base station to the one radio terminal and the other radio terminal, and during the first period, transmission of radio signals by the one radio terminal and the other radio terminal is performed without the access right being relinquished, and transmission of the radio signals by the one radio terminal and the other radio terminal under the space multiplexing scheme completes within the second period. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A radio base station to which a first radio terminal and a second radio terminal continuously can transmit radio signals without relinquishing access rights to transmit radio signals and which receives radio signals from the first radio terminal and the second radio terminal under a space multiplexing scheme, comprising:
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a receiving unit configured to receive a request signal for requesting an access right to transmit radio signals to the radio base station from the first radio terminal; a storage configured to store an identifier of a radio terminal which can transmit radio signals to the radio base station in association with the first radio terminal under the space multiplexing scheme; and a transmitting unit configured to transmit an assignment signal for assigning an access right to transmit radio signals to the radio base station to not only the first radio terminal which is a sender of the request signal but also the second radio terminal when an identifier of the second radio terminal is stored in the storage in association with the first radio terminal, wherein the request signal describes a first period during which radio signals can be continuously transmitted without relinquishing the access right and a second period which is a transmission period of radio signals under the space multiplexing scheme and is included in the first period, and the second period is shorter than the first period, the assignment signal describes the first period and the second period, and the receiving unit receives radio signals from the first radio terminal and the second radio terminal during the second period under the space multiplexing scheme. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification